Limitations on surrogate decision-making for emergent liver transplantation.

Background: Surrogate consent is an accepted form of promoting patient autonomy when patients cannot consent, but it can lead to surrogate duress and may be unreliable. Since consent for liver transplantation in patients with fulminant hepatic failure (FHF) is typically performed by surrogates and these patients typically regain decisional capacity, we chose this population to query patients' opinion on the surrogate consent process.

Materials And Methods: We developed a questionnaire that queried transplanted patients' experience and opinion on surrogate consent, suitability of surrogates, and return of decisional capacity.

In vitro preclinical cardiac assessment of tolterodine and terodiline: multiple factors predict the clinical experience.

Terodiline and tolterodine are drugs used to treat urinary incontinence. Terodiline was removed from the market in 1991 for proarrhythmia, whereas tolterodine has a generally benign clinical cardiac profile. To assess differences in the electrophysiologic actions of these drugs, we evaluated their effects on hERG current (HEK cells) and cardiac Purkinje fiber repolarization.

The utility of hERG and repolarization assays in evaluating delayed cardiac repolarization: influence of multi-channel block.

Drug-induced delayed cardiac repolarization is a recognized risk factor for proarrhythmia and is associated with block of IKr (the potassium current encoded by the human ether-a- go-go-related gene [hERG]). To evaluate the utility of 2 in vitro assays widely used to assess delayed repolarization, we compared the effects of haloperidol and 9 structurally diverse drugs in a hERG and repolarization (canine Purkinje fiber action potential duration [APD]) assay over wide concentrations. Despite potent hERG current block (IC50 = 0.